I was a U.S.P.S. letter carrier, a substitute , a hard job. A lot of problems with dogs. But also some real sweet ones, a blood hound that starting wiggling for joy when he saw me 10 houses down. A basset hound on a leash pulled his mom 100 yards because he wanted to say hello . Had to use pepper spray few times, there are mean dogs, usually they have mean owners IMHO>